[NOT FOR REVIEW][PPAPI] Implement MediaStreamVideoTrack pepper API

ppapi/thunk/ppb_media_stream_video_track_thunk.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// From ppb_url_loader.idl modified Wed Apr 17 11:16:00 2013.
+
+#include <string.h>
+
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/ppb_media_stream_video_track.h"
+#include "ppapi/shared_impl/tracked_callback.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_media_stream_video_track_api.h"
+#include "ppapi/thunk/thunk.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+PP_Bool IsMediaStreamVideoTrack(PP_Resource resource) {
+  VLOG(4) << "PPB_MediaStreamVideoTrack::IsVideoFrame()";
+  EnterResource<PPB_MediaStreamVideoTrack_API> enter(resource, false);
+  return PP_FromBool(enter.succeeded());
+}
+
+int32_t Configure(PP_Resource video_track, uint32_t max_buffered_frames) {
+  VLOG(4) << "PPB_MediaStreamVideoTrack::Configure()";
+  EnterResource<PPB_MediaStreamVideoTrack_API> enter(video_track, true);
+  if (enter.failed())
+    return enter.retval();
+  return enter.object()->Configure(max_buffered_frames);
+}
+
+struct PP_Var GetId(PP_Resource video_track) {
+  VLOG(4) << "PPB_MediaStreamVideoTrack::GetId()";
+  EnterResource<PPB_MediaStreamVideoTrack_API> enter(video_track, true);
+  if (enter.failed())
+    return PP_MakeNull();
+  return enter.object()->GetId();
+}
+
+PP_Bool HasEnded(PP_Resource video_track) {
+  VLOG(4) << "PPB_MediaStreamVideoTrack::HasEnded()";
+  EnterResource<PPB_MediaStreamVideoTrack_API> enter(video_track, true);
+  if (enter.failed())
+    return PP_TRUE;
+  return enter.object()->HasEnded();
+}
+
+int32_t GetFrame(PP_Resource video_track,
+                 PP_Resource* frame,
+                 struct PP_CompletionCallback callback) {
+  VLOG(4) << "PPB_MediaStreamVideoTrack::GetFrame()";
+  EnterResource<PPB_MediaStreamVideoTrack_API> enter(video_track, callback,
+                                                     true);
+  if (enter.failed())
+    return enter.retval();
+  return enter.SetResult(enter.object()->GetFrame(frame, enter.callback()));
+}
+
+int32_t RecycleFrame(PP_Resource video_track, PP_Resource frame) {
+  VLOG(4) << "PPB_MediaStreamVideoTrack::RecycleFrame()";
+  EnterResource<PPB_MediaStreamVideoTrack_API> enter(video_track, true);
+  if (enter.failed())
+    return enter.retval();
+  return enter.object()->RecycleFrame(frame);
+}
+
+void Close(PP_Resource video_track) {
+  VLOG(4) << "PPB_MediaStreamVideoTrack::Close()";
+  EnterResource<PPB_MediaStreamVideoTrack_API> enter(video_track, true);
+  if (enter.failed())
+    return;
+  enter.object()->Close();
+}
+
+const PPB_MediaStreamVideoTrack_0_1 g_ppb_media_stream_video_track_0_1 = {
+  &IsMediaStreamVideoTrack,
+  &Configure,
+  &GetId,
+  &HasEnded,
+  &GetFrame,
+  &RecycleFrame,
+  &Close
+};
+
+}  // namespace
+
+const PPB_MediaStreamVideoTrack_0_1* GetPPB_MediaStreamVideoTrack_0_1_Thunk() {
+  return &g_ppb_media_stream_video_track_0_1;
+}
+
+}  // namespace thunk
+}  // namespace ppapi